Designation A641/A641M − 09a (Reapproved 2014) Standard Specification for Zinc–Coated (Galvanized) Carbon Steel Wire1 This standard is issued under the fixed designation A641/A641M; the number immedia[.]
Trang 1Designation: A641/A641M−09a (Reapproved 2014)
Standard Specification for
This standard is issued under the fixed designation A641/A641M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S Department of Defense.
1 Scope*
1.1 This specification covers soft, medium, and hard temper
zinc-coated (galvanized) carbon steel wire in coils for general
use
1.2 The supplementary requirements of this specification
cover zinc-coated weights [masses] for nails, staples, and wire
from which nails and staples are cut and formed
1.3 This specification is applicable to orders in either
inch-pound units (as A641) or SI units (as A641M) Values
stated in either inch-pound units or SI units are to be regarded
separately as the standard Within the text, the SI units are
shown in brackets The values stated in the two systems are not
exact equivalents; therefore, each system shall be used
inde-pendent of the other, without combining values in any way
1.4 This specification and some referenced specifications
are expressed in both inch-pound and SI units If the order
specifies the applicable “M” specification designation, the
product shall be furnished to SI units
1.5 The text of this specification references notes and
footnotes which provide explanatory material These notes and
footnotes (excluding those in tables and figures) shall not be
considered as requirements of the specification
2 Referenced Documents
2.1 ASTM Standards:2
A90/A90MTest Method for Weight [Mass] of Coating on
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A700Practices for Packaging, Marking, and Loading
Meth-ods for Steel Products for Shipment(Withdrawn 2014)3
A902Terminology Relating to Metallic Coated Steel Prod-ucts
B6Specification for Zinc
E8Test Methods for Tension Testing of Metallic Materials
E29Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3 Terminology
3.1 Definitions—For definitions of terms used in this
specification, refer to Terminology A902
4 Classification
4.1 Temper—The wire is classified with regard to
mechani-cal properties by temper, which is related to tensile strength and stiffness The temper designations are soft, medium, and hard
4.2 Zinc Coating—Zinc coating on the wire is classified in
a number of classes (Class 1, 2, 3, or A, 4, B, 5, C (seeTable
1,Table 2,Table 3, andTable S1.1)) and as “regular coating.”
N OTE 1—Class 2 coating has been eliminated since it is no longer generally specified by users except for nails, staples, and wire from which nails and staples are cut and formed, as presented in the Supplementary Requirements.
5 Ordering Information
5.1 Orders for material under this specification shall include the following information:
5.1.1 Quantity (weight [mass]), 5.1.2 Coated wire diameter, 5.1.3 Intended use, when the wire is to be used for nails or staples (see Supplementary Requirement S1),
5.1.4 Class of coating (seeTable 1,Table 2, orTable 3(or Table S1.1when applicable)),
5.1.5 Temper (soft, medium, or hard) (Table 4 orTable 5), tensile strength-mechanical properties other than specified in Table 4orTable 5can be ordered upon agreement between the purchaser and producer,
5.1.6 ASTM designation and year of issue as A641– for inch-pound units, or A641M- for SI units
5.1.7 Supplementary Requirements (if required)
N OTE 2—A typical ordering description (inch-pound units) is as follows: 50 000 lb, 0.120 in., zinc-coated wire, Class 1 coating, soft
1 This specification is under the jurisdiction of ASTM Committee A05 on
Metallic-Coated Iron and Steel Products and is the direct responsibility of
Subcommittee A05.12 on Wire Specifications.
Current edition approved Nov 1, 2014 Published November 2014 Originally
approved in 1992 Last previous edition approved in 2009 as A641/A641M - 09a.
DOI: 10.1520/A0641_A0641M-09AR14.
2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 The last approved version of this historical standard is referenced on
www.astm.org.
*A Summary of Changes section appears at the end of this standard
Trang 2temper in 1500–lb coils on tubular carriers to ASTM A641– .
N OTE 3—A typical ordering description (SI units) is as follows: 50 000
kg, 3.00 mm., zinc-coated wire, Class 1 coating, soft temper in 1000–kg
coils on tubular carriers to ASTM A641M– .
6 Materials and Manufacture
6.1 The steel from which the wire is produced shall be made
by any commercially accepted steel making process
6.2 The slab zinc when used shall be any grade of zinc
conforming to SpecificationB6
7 Mechanical Properties
7.1 The zinc-coated wire, as represented by the test
speci-mens tested in accordance with Test Methods E8, shall
conform to the tensile strength requirements prescribed in
Table 4 or Table 5 Tensile strength-mechanical properties
other than specified inTable 4orTable 5can be ordered upon
agreement between the purchaser and producer
7.2 Test specimens found to contain a weld or obvious
imperfections shall be discarded and another test specimen
obtained to verify conformance to the tensile strength
require-ments
8 Permissible Variations
8.1 The permissible variation in diameter of the zinc-coated wire as represented by the test specimens shall meet the requirements shown inTable 6 orTable 7
9 Weight [Mass] of Coating
9.1 The zinc-coated wire, as represented by the test speci-mens tested in accordance with Section 12and Test Method A90/A90M, shall conform to the requirements of Table 1, Table 2, orTable 3for minimum weight [mass] of zinc coating
of the class specified Individual results not more than 10 % below the minimum values specified in Table 1, Table 2, or Table 3are allowed, if the average of at least two samples from the same coil are equal to or greater than the minimum value specified inTable 1,Table 2, orTable 3
9.2 Zinc-coated wire produced as “regular coating” shall have the full surface covered with zinc, but there is no specified minimum weight of coating
10 Adherence of Coating
10.1 The zinc-coated wire as represented by the test speci-mens shall be capable of being wrapped in a close helix at a rate not exceeding 15 turns/min around a cylindrical steel mandrel having a diameter as prescribed inTable 8orTable 9 without cracking or flaking the zinc coating to such an extent that any zinc can be removed by rubbing with the bare fingers Loosening or detachment during the adhesion test of superficial, small particles of zinc formed by mechanical polishing of the surface of the zinc-coated wire shall not be considered cause for rejection
11 Workmanship, Finish, and Appearance
11.1 The zinc-coated wire shall be free of slivers, scale, and other imperfections not consistent with good commercial practice The coating shall be continuous and reasonably uniform To ensure large continuous length coils, welds are permitted in the finished wire
TABLE 1 Minimum Weight [Mass] of Zinc per Unit Area of Uncoated Wire Surface (Inch-Pound Units)
Wire Diameter in.A Class 1 Class 3 or A Coating,
oz/ft 2
Class 4 Coating, oz/ft 2
Class B Coating, oz/ft 2
Class 5 Coating, oz/ft 2
Class C Coating, oz/ft 2
and larger
ACoating weights [mass] for diameters other than those shown in Table 1 are the coating weights [mass] for the next smaller diameter.
TABLE 2 Minimum Weight [Mass] of Zinc per Unit Area of
Uncoated Wire Surface (SI Units)
Wire Diameter, mm Class 1 Coating, g/m 2
Trang 312 Number of Tests and Retests
12.1 The number of test specimens taken from the ends of
coils during production to ensure compliance with Sections7,
8,9, and10vary with the quality control procedures and the
manufacturing facilities of each manufacturer but is generally
not less than 10 % of the coils produced For the purpose of
final product testing, one specimen from every ten coils or
fraction thereof in a lot shall be selected at random or a total of
seven specimens, whichever is less
12.2 A wire sample of sufficient length, approximately 4 ft
[1.2 m], shall be cut from either end of each coil selected for
tests described in Sections 7,8,9, and10
12.3 If one or more of the wire specimens fail any
requirement, the lot shall be subjected to retest For retest
purposes, the original lot shall be regrouped into 50 coil lots or
fractions thereof Each lot shall be 10 % tested for the property
in which the original sample failed to comply The number of
samples thus selected shall be at least twice the number of the original sampling Any lot that exhibits a failure shall be rejected
12.3.1 The manufacturer has the option of testing each coil
in the failed lot for the property in which the failure occurred, rejecting the nonconforming coils The coils which conform
TABLE 3 Minimum Weight [Mass] of Zinc per Unit Area of Uncoated Wire Surface (SI Units)
Diameter, mmA Class 3 or A Coating, g/m 2 Class 4 Coating, g/m 2 Class B Coating g/m 2 Class 5 Coating, g/m 2 Class C Coating g/m 2
and larger
ACoating weights [mass] for diameters other than those shown in this table are the coating weights [mass] for the next smaller diameter.
TABLE 4 Tensile Strength for Temper Designation (Inch-Pound
Units)
Wire Diameter, in Soft, KsiA
Medium, KsiA
Hard, KsiA
0.035 to under 0.080 75 max 70 to 100 90 to 120
0.080 to under 0.106 75 max 70 to 95 85 to 115
0.106 to 0.176A
, incl 70 max 65 to 90 80 to 110
Over 0.176 70 max 60 to 85 75 to 105
A
For the purpose of determining conformance with this specification, and observed
value shall be rounded to the nearest 1 Ksi in accordance with the rounding
method of Practice E29
TABLE 5 Tensile Strength for Temper Designation (SI Units)
SoftA MediumA HardA
0.20 to under 2.00 515 max 485 to 690 620 to 825
2.00 to under 2.50 515 max 485 to 655 585 to 795
2.50 to under 4.70 485 max 450 to 620 550 to 760
4.70 and over 485 max 415 to 585 515 to 715
AFor the purpose of determining conformance with this specification, an observed
value shall be rounded to the nearest 1 MPa in accordance with the rounding
method of Practice E29
TABLE 6 Diameter Tolerance for Zinc-Coated Wire in Coils
(Inch-Pound Units)A
Wire Diameter, in.
ToleranceBPlus and Minus, in Regular and Class 1
Coating
Class 3, 4, 5 or B and
C Coating 0.035 to under 0.076 0.002 0.002 0.076 to under 0.148 0.003 0.004 0.148 to 0.250, incl 0.003 0.004 Over 0.250 to 0.500, incl 0.003 0.005
AFor the purpose of determining conformance with this specification, an observed value shall be rounded to the nearest 0.001 in in accordance with the rounding method of Practice E29
B
It is recognized that the surfaces of heavy zinc coating, particularly those produced by hot galvanizing, are not perfectly smooth and devoid of irregularities The tolerances shown in Table 6 shall not be rigidly applied to such irregularities that are inherent to the product, so that unjustified rejections of wire that are actually satisfactory for use do not occur Therefore, it is intended that these tolerances be used in gaging the uniform areas of the zinc-coated wire.
TABLE 7 Diameter Tolerance for Zinc-Coated Wire in Coils (SI
Units)A
Wire Diameter, mm
ToleranceB, Plus and Minus, mm Regular and Class 1
Coating
Class 3, 4, 5 or A, B, and C Coating
AFor the purpose of determining conformance with this specification, an observed value shall be rounded to the nearest 0.01 mm in accordance with the rounding method of Practice E29
BIt is recognized that the surfaces of heavy zinc coating, particularly those produced by hot galvanizing, are not perfectly smooth and devoid of irregularities The tolerances shown in Table 7 shall not be rigidly applied to such irregularities that are inherent to the product, so that unjustified rejections of wire that is actually satisfactory for use do not occur Therefore, it is intended that these tolerances be used in gaging the uniform areas of the zinc-coated wire.
Trang 4for the property tested shall be deemed to conform to the
specification requirements
13 Inspection
13.1 Unless otherwise specified in the purchase order or
contract, the manufacturer is responsible for the performance
of all inspection and test requirements specified in this
speci-fication Except as otherwise specified in the purchase order or
contract, the manufacturer shall use his own or other suitable
facilities for the performance of the inspection and test
requirements, at his option, unless disapproved by the pur-chaser at the time the order is placed The purpur-chaser shall have the right to perform any of the inspection and tests prescribed
in this specification when such inspections and tests are deemed necessary to ensure that the material conforms to prescribed requirements
14 Rejection and Rehearing
14.1 Material that fails to conform to the requirements of this specification is subject to rejection Rejection shall be reported to the producer or supplier promptly and in writing In case of dissatisfaction with the results of the test, the producer
or supplier shall make claim for a rehearing
15 Certification
15.1 When specified in the purchase order or contract, a producer’s or supplier’s certification shall be furnished to the purchaser that the material was manufactured, sampled, tested, and inspected in accordance with this specification and has been found to meet the requirements When specified in the purchase order or contract, a report of the test results shall be furnished
16 Package and Package Marking
16.1 Unless otherwise specified, packaging, marking, and loading for shipment shall be in accordance with Practices A700
17 Keywords
17.1 galvanized wire; steel wire; wire; zinc-coated carbon steel wire
SUPPLEMENTARY REQUIREMENTS
The following supplementary requirements shall apply only when specified by the purchaser in the contract or order
S1 Zinc Coating on Wire for Nails and Staples
S1.1 These requirements apply only to nails and staples, and
coated wire from which nails and staples are cut and formed,
which are specified to have a Class 1 or Class 2 zinc coating
S1.2 Coating Weight [Mass]—The zinc coating weight
[mass] on the nails or staples, or on the wire to be used in the
manufacture of nails and staples, as represented by test
specimens tested in accordance with Section12of this speci-fication and Test Method A90/A90M, shall conform to the requirements ofTable S1.1for the class specified
S1.3 Class 2 Coating Requirements—The permissible
variation in diameter of nails, staples, or wire specified to have Class 2 coating shall be the same as shown for Class 1 coating
inTable 6or Table 7 The test for coating adherence on nails,
TABLE 8 Mandrel Diameters for Test for Adherence of Zinc
Coating (Inch-Pound Units)
Wire Diameter, in.
Mandrel Diameters for Coating Classes Regular and 1 Class 3, 4, 5 or A, B,
and C 0.035 to under 0.076 1D A
2D A
A D = nominal wire diameter being tested.
TABLE 9 Mandrel Diameters for Test for Adherence of Zinc
Coating (SI Units)
Wire Diameter, mm
Mandrel Diameters for Coating Classes Regular and 1 Class 3, 4, 5 or A, B,
and C 0.20 to under 1.90 1D A
2D A
A
D = nominal wire diameter being tested.
TABLE S1.1 Minimum Weight [Mass] of Zinc per Unit Area of Uncoated Nail, Staple, or Wire Surface
Diameter of Staple Leg,
Nail Shank, or Wire, in [mm]A
Class 1 Coating, oz/ft 2
[g/m 2
]
Class 2 Coating, oz/ft 2
[g/m 2
]
A
Coating weights [mass] for diameters other than those shown in Table S1.1 are the coating weights [mass] for the next smaller diameter.
Trang 5staples, or wire specified to have Class 2 coating shall be
conducted using the mandrel diameter as shown for Class 1
coating inTable 8 orTable 9
SUMMARY OF CHANGES
Committee A05 has identified the location of selected changes to this standard since the last issue (A641/A641M - 09) that may impact the use of this standard (March 1, 2009)
(1) Revised 5.1.5and7.1
Committee A05 has identified the location of selected changes to this standard since the last issue (A641/A641M - 03) that may impact the use of this standard (January 1, 2009)
(1) Revised 9.1
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